/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.inlong.dataproxy.source;

import io.netty.buffer.ByteBuf;
import io.netty.channel.Channel;
import java.util.Map;

public interface ServiceDecoder {

    int HEAD_LENGTH = 4;

    /**
     * extract data from buffer and convert it into map.
     * 
     * @param cb
     * @param channel
     * @return Map
     * @throws Exception
     */
    Map<String, Object> extractData(ByteBuf cb, Channel channel) throws Exception;
}
